Researcher (IMAGE) University of California - San Diego Caption Researchers at the UC San Diego Sanford Stem Cell Institute evaluate cell samples after they have returned from low Earth orbit. Credit UC San Diego Health Sciences Usage Restrictions Use photo credit License Original content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.